25870989 has 8 divisors (see below), whose sum is σ = 36310240. Its totient is φ = 16339536.

The previous prime is 25870973. The next prime is 25870997. The reversal of 25870989 is 98907852.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 25870989 - 2⁴ = 25870973 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25870189) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 226882 + ... + 226995.

It is an arithmetic number, because the mean of its divisors is an integer number (4538780).

Almost surely, 2^25870989 is an apocalyptic number.

It is an amenable number.

25870989 is a deficient number, since it is larger than the sum of its proper divisors (10439251).

25870989 is a wasteful number, since it uses less digits than its factorization.

25870989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453899.

The product of its (nonzero) digits is 362880, while the sum is 48.

The square root of 25870989 is about 5086.3532122730. The cubic root of 25870989 is about 295.7588011053.

The spelling of 25870989 in words is "twenty-five million, eight hundred seventy thousand, nine hundred eighty-nine".